Have the flu

31 female 132 lbs~ pretty sure I have the flu. It started Friday so day 3 and I feel the absolute worst today so far. Lots of fatigue .Fever lasting between 99-100.6 or so.pulse reader says 85-98- oxygen good.When I get out of bed to try to eat or get tea I have chills like crazy and extremely cold hands and feet. Body aches are super bad too. Legs,hands eyes etc. congestion came on today. Slight cough. Basically my questions are I do struggle with health anxiety and with how bad the flu has been going around I'd like to no what symptoms could be sepsis bc that's always a fear of mine or what symptoms and temps are worth hospital visits? Thanks in advance!